Why is beta carotene not ionizing in LCMSMS even though the source has been changed to APCI?

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Ilja Burdman

Hi,

please provide some further details. Are your sure that it is an issue of your source ? What kind of mass spec are you using?

Best regards,

Ilja

Kalyan Chekraverthy Bhadram

Sir i have calibrated the APCI source it was fine. But i am still getting the issue.. the mass is highly detecting at 536 m/z possitive ionization.. but in possitive it should be around 537m/z .